Multi-mode set multi-purpose hydrometric cableway flow measurement device and method

Abstract

The invention discloses a multi-mode set multi-purpose hydrometric cableway flow measurement device and method. The device consists of a self power generating system, a water quality self measuring system, a self early warning system and a signal self transmission system. The Fourier transformation infrared spectrum is used for detecting a self collection water sample; the real-time observation on the water quality of the measured cross section water body is realized; an armature winding is installed and embedded in an improved hydrometic propeller in a matched way to form a bearing of a motor rotor; an iron core and a stator winding are installed and embedded to form a shaft sleeve of the motor stator; the self power generation function between the stator and the rotor under the excitation effects is realized; a wireless electromagnetic sensor is matched for realizing the goal of meeting the data normal transmission and storage under the condition of wireless data transmission failure. The device and the method can be widely applied to various kinds of cable flow measurement processes of hydrological stations; the multi-mode multi-angle and multi-function purpose of the self power generation flow measurement, self monitoring on water quality condition, self transmission of flow speed and water quality signal data and self early warning can be achieved under the emergency conditions (such as the conditions of power supply equipment water damage and sudden power failure).

Description

technical field [0001] The invention relates to a multi-mode and multi-purpose hydrological cableway flow measuring device and method, belonging to the field of hydrological instruments. Background technique [0002] There are many methods of flow measurement involved in the process of hydrological testing, and there are mainly two methods of flow measurement: first, mechanical flow measurement, including conventional propeller (or cup) type current meter flow measurement, mechanical rotor flow meter flow measurement, etc. ; Second, automatic flow measurement, including Doppler flow meter flow measurement, electromagnetic flow meter flow measurement, acoustic point flow meter flow measurement, radio current flow meter flow measurement, optical current flow meter flow measurement, etc. [0003] Velocity and discharge measurement is an indispensable part of the basic data of hydrological model tests, and the above two types of flow measurement methods also have various shortco...

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Problems solved by technology

This requires a certain number of transmission cables to be arranged. In addition, when the transmission distance is relatively long, the signal attenuation is serious and the data error rate is relatively high. To ensure the validity of the data, it is necessary to add auxiliary equipment to effectively amplify the signal; the mechanical rotor flow meter , this kind of flow meter has defects such as narrow speed measurement range, high starting flow speed, inability to measure weak flow, fear of floating objects such as sediment, water plants, damage to flow field, easy damage of sensor, low measurement accuracy, and failure to meet the needs of long-term automatic monitoring. The Doppler flowmeter uses an ultrasonic transducer to detect the flow velocity with ultrasonic waves. Although the accuracy is high, the cost is high; the electromagnetic flowmeter uses the principle of electromagnetic induction to measure the conductive fluid according to the electromotive force generated when the conductive fluid passes through an external magnetic field. Flow, used for indirect measurement of flow velocity, has the problem of low measurement efficiency

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